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E.. E. JENKINS.

ADJUSTABLE BOOK AND ARM REST.

APPLICATION FILED JAN. 23. I919.

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APPLICATION FILED JAN. 23.1919.

Patented Oct. 14, 1919.

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can STATES PATENT curios.

EDWARD E. JENKINS. 0F LOUISVILLE, ILLINOIS.

AnJosrArLE BOOK AND Ania Basra.

Application filed Janua y as. 1919. Serial no. 272.673.

To all whom it may concern:

Be it known that I, EDWARD E. JENKINS, a citizen of the United States,residing at Louisville, in the county of Clay and State of Illinois,have invented certain new and useful Improvements in Adjustable Book andArm Rests, and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in book and armrests for use in connection with heavy leather books, to hold andsupport the same securely in different positions.

My invention consists of a simple and efficient device of this characterhaving various details of construction, combination and arrangement ofparts which will be hereinafter fully described, shown in theaccompanying drawings and then specifically defined in the appendedclaim.

My invention is illustrated in the accompanying drawings which, with theletters of reference marked thereon, form a part of this application,and in which:

Figure l is a side elevation of the book rest.

Fig. 2 is a top plan view.

Fig. 3 is a sectional view showing the means for holding the book restat different elevations,

Fig. 4 is a detail sectional view showing the springs for raising thebook rest, and

Fig. 5 is a detail view of a part of the invention.

Reference now being had to the details of the drawings by letter:

A designates the base of the book rest having flanges B risingtherefrom, and which are provided with elongated slots 0. A rod D ispivoted in suitable bearings upon the base and has pivotal connectionswith the corresponding ends of the bars F. Other bars H are pivotallymounted upon the rod I passed through the center of the bars, and N is arod carried by corresponding ends of the bars H, and the ends of saidrod N project into said slot C in which they are adapted to have asliding movement as the two sets of bars are folded or extended, for thepurpose of raising or lowering the book rest. The top of the book restis designated by letter O and has flanges 0 upon the Specification ofLetters Patent.

Patented Oct. 14, 1919.

undensurface thereof which are slotted as at P- The corresponding endsof the bars F have a rod J, the ends of which extend into the slots P inwhich they have a sliding movement. A rod L is fastened to the underside of the top 0, and upon which rod L the adjacent ends of the bars Hare pivoted. Collars T are mounted upon the rod I and fastened one toeach of the adjacent faces of the bars H and F at their points of intersection and the adjacent faces of the collar are provided withratchet teeth which intermesh with one another, and so arranged that theteeth upon the collars will turn idly when the rack is extended, butwhen the latter comes to a rest in a horizontal position, the teeth willintermesh and hold the rack in its adjusted position.

Leaf springs S are fastened at their ends to the base and their freeends bear yieldingly against the under edges of the bars F adjacent totheir stationary pivotal ends,

said springs being provided for the purpose of raising the rack to itsadjusted position.

At one end of the book rest is an arm rest M of similar construction asthe book rest and bars M .are pivotally mounted at corresponding endsupon the rod M which latter moves in a slot M in the flange M upon thebase M while a rod Q fastened to the ends of the bars Q, is pivotallymounted upon one end of the base M A rod Q is fastened to thecorresponding ends of the bars Q and engages slots Q in the flanges Qprojecting from the under side of the rest M.

In the drawings I have illustrated a single book rest, but if desired,the same may be made double for holding either two books or each holdingone side of a large book, and other variations may be made in thedetailed construction of the apparatus without departing from the spiritof the invention.

In operation, when it is desired to hold a book at a certain height, theoperator may raise the book rest, the latter being held at all times inhorizontal planes, and by the provision of the intermeshing teeth of thecollars, the rest may be held in such adjusted positions.

What I claim to be new is:

Abook rest, comprising intersecting bars bars are pivoted, roundscarried at the ends of said bars, a base and table pivotally connectedto said rounds, the adjacent faces of said bars having bosses withserrations 5 adapted to interinesh, a cam nut mounted upon said shaft,the adjacent bar having a lateral projection with a cam edge adapted tocooperate with the cam edge of the nut -to flex the adjacent bar tothrow the teeth 10 of the bosses into intermeshing relation with eachother, springs fastened to the base and adapted to bear against the barsadjacent thereto near their lower pivotal ends.

In testimony whereof I hereunto affix my signature in presence 01": twowitnesses.

EDWARD E. JENKINS.

Witnesses:

LOUIS W. CoGsWnLL, P. E. SPEAKs.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

